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"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _invariant = require("@react-dnd/invariant");

var _matchesType = _interopRequireDefault(require("./utils/matchesType"));

var _coords = require("./utils/coords");

var _dirtiness = require("./utils/dirtiness");

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

var DragDropMonitorImpl =
/*#__PURE__*/
function () {
  function DragDropMonitorImpl(store, registry) {
    _classCallCheck(this, DragDropMonitorImpl);

this.store = store;
    this.registry = registry;
  }

_createClass(DragDropMonitorImpl, [{
    key: "subscribeToStateChange",
    value: function subscribeToStateChange(listener) {
      var _this = this;

var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {
        handlerIds: undefined
      };
      var handlerIds = options.handlerIds;
      (0, _invariant.invariant)(typeof listener === 'function', 'listener must be a function.');
      (0, _invariant.invariant)(typeof handlerIds === 'undefined' || Array.isArray(handlerIds), 'handlerIds, when specified, must be an array of strings.');
      var prevStateId = this.store.getState().stateId;

var handleChange = function handleChange() {
        var state = _this.store.getState();

var currentStateId = state.stateId;

try {
          var canSkipListener = currentStateId === prevStateId || currentStateId === prevStateId + 1 && !(0, _dirtiness.areDirty)(state.dirtyHandlerIds, handlerIds);

if (!canSkipListener) {
            listener();
          }
        } finally {
          prevStateId = currentStateId;
        }
      };

return this.store.subscribe(handleChange);
    }
  }, {
    key: "subscribeToOffsetChange",
    value: function subscribeToOffsetChange(listener) {
      var _this2 = this;

(0, _invariant.invariant)(typeof listener === 'function', 'listener must be a function.');
      var previousState = this.store.getState().dragOffset;

var handleChange = function handleChange() {
        var nextState = _this2.store.getState().dragOffset;

if (nextState === previousState) {
          return;
        }

previousState = nextState;
        listener();
      };

return this.store.subscribe(handleChange);
    }
  }, {
    key: "canDragSource",
    value: function canDragSource(sourceId) {
      if (!sourceId) {
        return false;
      }

var source = this.registry.getSource(sourceId);
      (0, _invariant.invariant)(source, 'Expected to find a valid source.');

if (this.isDragging()) {
        return false;
      }

return source.canDrag(this, sourceId);
    }
  }, {
    key: "canDropOnTarget",
    value: function canDropOnTarget(targetId) {
      // undefined on initial render
      if (!targetId) {
        return false;
      }

var target = this.registry.getTarget(targetId);
      (0, _invariant.invariant)(target, 'Expected to find a valid target.');

if (!this.isDragging() || this.didDrop()) {
        return false;
      }

var source = this.registry.getSource(sourceId, true);
      (0, _invariant.invariant)(source, 'Expected to find a valid source.');

if (!this.isDragging() || !this.isSourcePublic()) {
        return false;
      }

var sourceType = this.registry.getSourceType(sourceId);
      var draggedItemType = this.getItemType();

if (sourceType !== draggedItemType) {
        return false;
      }

return source.isDragging(this, sourceId);
    }
  }, {
    key: "isOverTarget",
    value: function isOverTarget(targetId) {
      var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {
        shallow: false
      };

// undefined on initial render
      if (!targetId) {
        return false;
      }

var shallow = options.shallow;

if (!this.isDragging()) {
        return false;
      }

var targetType = this.registry.getTargetType(targetId);
      var draggedItemType = this.getItemType();

if (draggedItemType && !(0, _matchesType.default)(targetType, draggedItemType)) {
        return false;
      }

var targetIds = this.getTargetIds();

if (!targetIds.length) {
        return false;
      }

var index = targetIds.indexOf(targetId);

if (shallow) {
        return index === targetIds.length - 1;
      } else {
        return index > -1;
      }
    }
  }, {
    key: "getItemType",
    value: function getItemType() {
      return this.store.getState().dragOperation.itemType;
    }
  }, {
    key: "getItem",
    value: function getItem() {
      return this.store.getState().dragOperation.item;
    }
  }, {
    key: "getSourceId",
    value: function getSourceId() {
      return this.store.getState().dragOperation.sourceId;
    }
  }, {
    key: "getTargetIds",
    value: function getTargetIds() {
      return this.store.getState().dragOperation.targetIds;
    }
  }, {
    key: "getDropResult",
    value: function getDropResult() {
      return this.store.getState().dragOperation.dropResult;
    }
  }, {
    key: "didDrop",
    value: function didDrop() {
      return this.store.getState().dragOperation.didDrop;
    }
  }, {
    key: "isSourcePublic",
    value: function isSourcePublic() {
      return this.store.getState().dragOperation.isSourcePublic;
    }
  }, {
    key: "getInitialClientOffset",
    value: function getInitialClientOffset() {
      return this.store.getState().dragOffset.initialClientOffset;
    }
  }, {
    key: "getInitialSourceClientOffset",
    value: function getInitialSourceClientOffset() {
      return this.store.getState().dragOffset.initialSourceClientOffset;
    }
  }, {
    key: "getClientOffset",
    value: function getClientOffset() {
      return this.store.getState().dragOffset.clientOffset;
    }
  }, {
    key: "getSourceClientOffset",
    value: function getSourceClientOffset() {
      return (0, _coords.getSourceClientOffset)(this.store.getState().dragOffset);
    }
  }, {
    key: "getDifferenceFromInitialOffset",
    value: function getDifferenceFromInitialOffset() {
      return (0, _coords.getDifferenceFromInitialOffset)(this.store.getState().dragOffset);
    }
  }]);

return DragDropMonitorImpl;
}();

exports.default = DragDropMonitorImpl;